Install 3.71 M33 on Your PSP in 4 Easy Steps

This post may be a bit late but I know a lot of you PSP owners out there are looking for installation guide for the 3.71 M33. For a bit of information, 3.71 M33 was created by Dark Alex. In other words, M33 is Dark Alex. Now on to the instructional guide!

Requirements

  • You must have 3.52 M33-4 installed on your PSP. If you don’t have one yet, lucky for you I wrote a guide on installing 3.52 M33-4 too.
  • A Slim (PSP2000) or Fat PSP (The older version) with 78% or more battery.
  • PSP AC adaptor
  • A USB Cable
  • A Computer
  • Ability to understand and follow instructions
  • If you have the fat PSP, configure GAME folder to run on 3.52. How? Shutdown your PSP. Then power on your PSP while holding down your R button. This will take you to the recovery menu. Go to Configuration > Game folder homebrew and check if 3.52 is enabled. Press X or circle if not. Exit the recovery menu.

That’s it. if you have all these then you are ready to go!

Now here are the 4 very easy steps:

  1. Download the 3.71 M33 installer pack I’ve made just for you. Extract the file to anywhere on your computer.
  2. Connect your PSP to your computer via USB and copy the UPDATE folder to ms0:/PSP/GAME
  3. Go to your XMB menu and run the M33 update program. The screen will go black and this is normal. Follow the instructions. Be sure you have your PSP plugged-in to the AC adaptor. Screen will change to the Sony Update screen. Accept and update.
  4. This last instruction is VERY important. After the update is finished, the updater will ask you to reboot by pressing X or O. Do so, press X or O and the PSP will restart. Have fun on your new upgraded PSP!

After successfully upgrading your PSP to 3.71 M33, you can install the 3.71 M33-2 update by following the guide I made here. Special credits go to Dark Alex. You can send him donations on his website via PayPal.

UPDATE: I wrote a guide on how to add the 1.50 Kernel Add-on for 3.71 M33. Please check it out if you need it.

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  1. Comment #237
    toe on June 29, 2009 at 4:47 am reply

    just recreate the GAME folder inside the PSP folder

    mine did the same thing.

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  2. Comment #236
    gil on June 24, 2009 at 10:13 am reply

    i have rockband unplugged when i put it in iso folder it works but when i go in home it says no games in memory stick but when i checked it in my computer there it is in the iso folder… any help?

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  3. Comment #235
    K on June 5, 2009 at 9:39 pm reply

    i have 3.52 m33-4 but it keeps saying it needs higher version.pls help

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  4. Comment #234
    emovhic on April 17, 2009 at 2:16 am reply

    hello can you help me how to fix my broken analog/joystick? do you have a guide for that?

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  5. Comment #233
    Kyle Liong on December 1, 2008 at 1:47 am reply

    help mine says something like 006×0000000 idstorage degeneration something like thet heeeeeeeelp

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  6. Comment #232
    LINDEL on November 21, 2008 at 3:35 pm reply

    update my slim psp using wifi after the update my games cannot be played anymore. pls help! my ver. now is 5.01

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  7. Comment #231
    jan michael on November 21, 2008 at 10:42 am reply

    dats my problem too..

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